Geomechanical aspects of the genesis of exo-and endokarst

Русин, Е. П.; Stazhevskii, S. B.; Хан, Г. Н.

doi:10.1007/s10913-007-0014-6

Cited by 6 publications

(10 citation statements)

References 6 publications

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“…4), which differs from the pipe formation in Fig. 1 Figure 5a (from [9], with slight changes) shows a version of incomplete healing (emersion) of a karst structure, which is analogous to the situation in Fig. 1a.…”

Section: Karst and Sinkhole Formationmentioning

confidence: 69%

“…The work [9] proposed and substantiated a new model of the endogenic karst, associated with the subsurface outgassing, emergence of RSs from deep levels, softening of the rock mass under the RSs and this rock mass consolidation later on. The model from [9] explained the causes and sources of outcropping of large dolines as "incomplete" emergence or healing of the RSs and the pipe formation in the geo-environment.…”

Section: Introductory Remarksmentioning

confidence: 81%

“…5a that in the course of healing of the once emerged ring structure above the block Q, a bridge having thickness * h can remain between the block top and the free boundary. Given definite values of * h and the bridge-composing rock strength, channel 1 with a diameter 0 d starts from the top of Q toward the surface [9]. The channel grows upward with the assistance of gravitation and solid tides by the scheme of breaks and wedging out (Fig.…”

Section: Karst and Sinkhole Formationmentioning

confidence: 99%

“…The model [9] says that karst voids and pipe above them are the consequence of the consolidation of the crustal rocks deformed by outgassing and cratering processes. Both the surface subsidence and the pipe formation are sourced from the "basic" deformation cycle at different scales.…”

Section: Karst and Sinkhole Formationmentioning

confidence: 99%

“…The model from [9] explained the causes and sources of outcropping of large dolines as "incomplete" emergence or healing of the RSs and the pipe formation in the geo-environment. These concepts are refined below, based on the new factual data.…”

Section: Introductory Remarksmentioning

confidence: 99%

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Origination and development mechanics of the Earth’s morphostructures. Part II: The nature of diatreme, karst and trappean formations, and the chicxulub crater origin

Stazhevsky

2012

J Min Sci

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The article analyzes genesis of representative morphostructures of the Earth, and substantiates that their origin, similarly to the Patomsky crater, is associated with the hydrogen outgassing and pipe formation in the internal part of the Earth, or, to put it otherwise, with the development of different diameter ring shape structures in the hard shell of the planet. Evolution of all the structures can be described with the dilatancy-explosion model, independent of their dimension. The author explains the billions years history of integration of these endogenous structures into great families of different scale, age and depth ring structures. It is shown that this global process is based on the plume-tectonics.A "kimberlite diatreme" origination involves pipe formation and eruption, similarly to the genesis of the Patomsky ring structure (ring structure are hereinafter put as RS) [1], though the mechanism of these processes remains unclear [2]. According to [1], the pipe formation process provides degassing of the subsoil having the solid outer jacket, and the eruption is associated with the presence of explosive gases, such as Н 2 , СН 4 , СО etc., during the outgassing. These notions make up the basis for a dilatancy and explosion model of cratering (or an RS formation) that allowed explaining the Patomsky crater genesis. Figure 1 shows experimental results with sand to simulate pipe formation in the subsoil. The pipe formation phenomenon is a result of deep-level processes, it starts with a focal zone and goes on as subsequent localized shears along conical and cylindrical rupture lines (RL1 and RL2, respectively, in Fig. 1) with a step l governed by a diameter 0 d of the "focus" and the strength of surrounding rocks. Localized deformation surfaces form a cylinder channel in geo-environment, the channel is filled with a granular block-structured medium. The rupture lines act as the maximum softening zones in the substrata and turn into conductor tracks for fluids toward the earth surface.The Patomsky crater originated as a result of collision and mix of juvenile gas and free air at depth 0 0in the said channel, followed with eruption and rock column displacement from the depth 0 h to the surface, and ended with the fall of rocks back into the formed hollow pipe with the height 0 h [1]. The other consequences of the Patomsky RS are (1) a trough-like depression, coaxial with the crater but with larger diameter, with a "root" as the long-living downward-tapered softening zone; (2) concentration of fluids in the softening zone, including waters; (3) increase in the content of these fluid from the said zone periphery to its center; (4) alteration of geophysical fields in radial direction in this zone; (5) appearance of mixed broken crustal rocks, local soil and vegetation at the top near the zone axis.

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Section: Karst and Sinkhole Formationmentioning

confidence: 69%

Section: Introductory Remarksmentioning

confidence: 81%

Section: Karst and Sinkhole Formationmentioning

confidence: 99%

Section: Karst and Sinkhole Formationmentioning

confidence: 99%

Section: Introductory Remarksmentioning

confidence: 99%

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